Neural mechanisms of visual selective attention

Research output: Contribution to journalArticle

615 Scopus citations

Abstract

Visual selective attention improves our perception and performance by modifying sensory inputs at an early stage of processing. Spatial attention produces the most consistent early modulations of visual processing, which can be observed when attention is voluntarily allocated to locations. These effects of spatial attention are similar when attention is cued in a trial- by-trial, or sustained, fashion and are manifest as changes in the amplitudes, but not the latencies, of evoked neural activity recorded from the intact human scalp. This modulation of sensory processing first occurs within the extrastriate visual cortex and not within the striate or earlier subcortical processing stages. These relatively early spatial filters alter the inputs to higher stages of visual analysis that are responsible for feature extraction and ultimately object perception and recognition, and thus provide physiological evidence for early precategorical selection during visual attention. Moreover, the physiological evidence extends early selection theories by providing neurophysiologically precise information about the stages of visual processing affected by attention.

Original languageEnglish (US)
Pages (from-to)4-18
Number of pages15
JournalPsychophysiology
Volume32
Issue number1
StatePublished - 1995

Keywords

  • Event-related potentials
  • Human
  • Selective attention
  • Vision

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Psychology(all)
  • Experimental and Cognitive Psychology
  • Neuropsychology and Physiological Psychology

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